William Treharne of Llanarthney, Carmarthenshire

I am looking for any information on William Treharne.He married Mary Lewis and had the following children.David dob: 1834, Evan dob: 1841, Morgan dob: 1846, Thomas dob:1847, Margaret dob:1849, Jane dob: 1851, Lewis dob: 1854, Ann dob: 1841.Most of the children were born in Llanddarog, carmarthen.If anyone can help much appreciated.